DSpace Community:http://hdl.handle.net/10928/252018-10-13T01:31:30Z2018-10-13T01:31:30Zウェブスターのホーン方程式における摂動論による高精度計算手法濱野, 慶太坂本, 昇一富谷, 光良http://hdl.handle.net/10928/10822018-10-11T16:30:08Z2018-05-31T15:00:00ZTitle: ウェブスターのホーン方程式における摂動論による高精度計算手法
Authors: 濱野, 慶太; 坂本, 昇一; 富谷, 光良
Abstract: Applying mathematical and quantum mechanical techniques, this study develops numerical solutions to Webster's horn equation, which describes the sound inside brass instruments in acoustics. The wavenumbers and wave functions of the modes in the system are evaluated by perturbation theory, assuming a solvable system with relatively small perturbations. An obvious solvable example is a straight pipe, whose wavenumbers can be perturbed by varying the radius of the horn. Maintaining the second-order corrections, the method generated astonishingly accurate results for varying horn shapes. Moreover, in tests of various pipe shapes, the perturbation method required far fewer computational resources than the finite element method. Two analytically solvable shapes and two non-solvable models (one of them is a periodic shape described by a trigonometric function) are analyzed. The results imply the applicability of the method to highly non-solvable systems.2018-05-31T15:00:00ZRoberto Ungerの構造論についてのノート吾妻, 聡http://hdl.handle.net/10928/10812018-10-11T16:30:07Z2018-06-21T15:00:00ZTitle: Roberto Ungerの構造論についてのノート
Authors: 吾妻, 聡2018-06-21T15:00:00Zアノマリーを活かしたナッジングのためのフレームワーク : ナッジツールのレビューと整理山崎, 由香里http://hdl.handle.net/10928/10762018-08-21T16:30:09Z2018-07-19T15:00:00ZTitle: アノマリーを活かしたナッジングのためのフレームワーク : ナッジツールのレビューと整理
Authors: 山崎, 由香里2018-07-19T15:00:00ZThe Effects of Individual and Situational Factors on Self-learning ActivitiesUeda, Yutakahttp://hdl.handle.net/10928/10772018-08-21T16:30:10Z2018-07-19T15:00:00ZTitle: The Effects of Individual and Situational Factors on Self-learning Activities
Authors: Ueda, Yutaka
Abstract: Self-learning is one of the most typical activities of self-development. Although self-development has been regarded as a type of organizational citizenship behavior (OCB), it has rarely been examined in OCB literature. This study focuses on selflearning activities and empirically examines whether they are influenced by job satisfaction, stress, and life happiness. After a discussion on whether self-learning activities can be viewed as a form of OCB, the effects of these variables on various kinds of self-learning activities are analyzed using data collected from more than 30,000 workers. While the positive impacts of job satisfaction and life happiness are empirically revealed, as expected, a positive effect of stress on these activities is demonstrated, contrary to the hypothesis. Some discussion in response to the empirical results is also proposed.2018-07-19T15:00:00Z